Sharpening device



May 9, 1933. R. w. READER SHARPENING DEVICE Filed June 15 1952 RoberfReader file/$0M- 561) ELM;

Patented May 9, 1933 UNITED STATES PATENT-f ROBERT w. READER, OFHARRISBURG, rENN'sYLvAnIA, ASSIGNOR TOUNEW, rGn'ron NOVELTIES,INCORPORATED, OF NEW R IGRT BENNSYLVANIA, A, CQRP TION OF PENNSYLVANIASHARPENING DEVICE Application filed June 15,

This invention relates to a sharpening device for knives and othercutlery.

The object of the invention is to provide a very simple and eflicientdevice which can be manufactured cheaply in quantlty production.

' Other objects of the invention will become apparent as the detaileddescription thereof proceeds.

In the drawing:

Figure 1 is a perspective view of the invention as mounted upon asupport and used for sharpening purposes;

Figure 2 is a plan view of the device;

Figure 3 is a vertical section taken on the line 33 of Figure 2;

Figure 4 is a perspective view of a blank in which the sharpeningelements of the invention are mounted; and V Figure 5 is a perspectiveview of one of the sharpening elements. 7

As shown in the drawing, the invention comprises a frame 1 stamped outof resilient sheet material. This frame comprises a base 2 having sideflanges 3 and 4 turned upwardly therefrom at substantially right anglesto the base 2. The base 2 is provided with apertures 5 and 6 adapted toreceive suitable fastening members such as nails or screws for securingthe frame to a wall or other support when desired.

The side flange 3 is provided with tabs 7 and 8 adapted to be bent overthe inclined edges9 and 10, respectively, of a sharpening element 11.The element 11 comprises a substantially triangular slab of abrasivematerial. This slab of material is provided with a broad flat base 12adapted toseat squarely on the base plate 2. The side edges 13 and 14extend upwardly at an angle from thebase 12 and merge into ahemispherical part 15. The flat base 12 cooperates with the tabs 7 and 8in holding the element 11 securely positioned on the base 2 and againstthe inner face of the flange 3.

The side flange 4 is likewise provided with tabs 16 and 17 adapted to bebent over the inclined edges of a second sharpening element 11 similarin every respect to the sharpening element 11, previously described1932. Serial No. 617,412.

as secured in the frame 1 by the tabs 7 and are interchangeable witheach other, and

the side flanges 3 and 4 are shaped so as to conform somewhat closely tothe outline of the sharpening elements. These sharpening elements andthe frame 1 are so dimensioned that when the elements are properlypositioned in the frame 1, as shown in the drawing, the twohemispherical parts 15 make point contact with each other and are heldyieldingly in such contact by the inherent resilience "6f the sides 3and 4 of the frame 1.

It is to be understood that the material of which the frame 1 is madeshall possess suflicient resilience to hold the parts 15 of the elementsHand 11' in such pointcontact with each other throughout the sharpeningoperation of the device, as illustrated in Figure 1 of the drawing. Itis to be noted that this device comprises three elements only; namely,the frame 1, and the two sharpening elements 11 and 11", which are heldin position-in the frame 1 by the resilience of the frame and by thetabs formed integral with the sides of said frame.

It is evident that the frame can be stamped out of a blank by a singlestamping opera tion, that the elements 11 and 11 can very readilyassembled therein; and that the shape of the elements, corresponding tothe shape of the side flanges 3 and 4 of the frame, enable theseelements to be positioned in their frame very quickly and accurately.While I have described my invention as embodied in concrete form and asoperating in a specific manner in accordance with the provisions of thepatent statutes, it should be understood that I do not limit myinvention thereto, since various modifications thereof will suggestthemselves to those skilled in the art without departing from the spiritof my invention, the scope of which is set forth in the annexed claim.

What I claim is:

A sharpening device comprising a frame stamped out of a sheet ofresilient material to form a substantially rectangular base plate, apair of substantially triangular flanges extending from the oppositeedges of said base plate and parallel to each other, a pair ofsubstantially triangular sharpening elements each of which has ahemispherical part formed at its apex, and, has its base seated on saidplate between said flanges and with said parts in yielding point contactwith each other, said flanges including tabs bent over the sharpeningelements to maintain them in position on said base plate;

In testimony whereof, I afiix my signature.

ROBERT W. READER.

